<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8" />
  <title>15_姓名案例</title>
  <!-- 引入Vue -->
  <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
  <!-- 准备好一个容器-->
  <div id="demo">
    姓:<input type="text" v-model="firstName"><br>
    名:<input type="text" v-model="lastName"><br>
    姓名:<span>{{getFullNames}}</span>
    <button @click="revise">点击修改名字</button>
  </div>
</body>

<script type="text/javascript">
  //阻止 vue 在启动时生成生产提示。
  Vue.config.productionTip = false;
  new Vue({
    el: '#demo',
    data: {
      firstName: 'zhang',
      lastName: 'san'
    },
    // 方法
    methods: {
      revise() {
        this.getFullNames = 'liu-ll'
      }
    },
    // 计算属性
    computed: {
      getFullNames: {
        get() {
          return this.firstName.slice(0, 1).toUpperCase() + this.firstName.slice(1) + '-' + this.lastName
        },
        set(value) {
          let [a, b] = value.split('-')
          this.firstName = a;
          this.lastName = b
          console.log(111);
        }
      }
    }
  })
</script>

</html>